Abstract:
Systems, methods, and apparatus for processing a substrate in a plasma processing apparatus using a variable pattern separation grid are provided. In one example implementation, a plasma processing apparatus can have a plasma chamber and a processing chamber separated from the plasma chamber. The apparatus can further include a variable pattern separation grid separating the plasma chamber and the processing chamber. The variable pattern separation grid can include a plurality grid plates. Each grid plate can have a grid pattern with one or more holes. At least one of the plurality of grid plates is movable relative to the other grid plates in the plurality of grid plates such that the variable pattern separation grid can provide a plurality of different composite grid patterns.
Abstract:
Plasma processing with post plasma gas injection is provided. In one example implementation, a plasma processing apparatus includes a plasma chamber. The apparatus includes a processing chamber separated from the plasma chamber. The processing chamber includes a substrate holder operable to support a workpiece. The apparatus includes a plasma source configured to generate a plasma in the plasma chamber. The apparatus includes a separation grid separating the plasma chamber from the processing chamber. The separation grid can be configured to filter one or more ions generated in the plasma and allow the passage of neutral particles from the plasma chamber to the processing chamber. The apparatus can include at least one gas port configured to inject a gas into neutral particles passing through the separation grid.
Abstract:
A workpiece support is disclosed defining a workpiece-receiving surface. The workpiece support includes a plurality of fluid zones. A fluid, such as a gas, is fed to the fluid zones for contact with a workpiece on the workpiece support. The fluid can have selected thermoconductivity characteristics for controlling the temperature of the workpiece at particular locations. In accordance with the present disclosure, at least certain of the fluid zones are at different azimuthal positions. In this manner, the temperature of the workpiece can be adjusted not only in a radial direction but also in an angular direction.
Abstract:
Separation grids for plasma processing apparatus are provided. In some embodiments, a plasma processing apparatus includes a plasma chamber. The plasma processing apparatus includes a processing chamber. The processing chamber can be separated from the plasma chamber. The apparatus can include a separation grid. The separation grid can separate the plasma chamber and the processing chamber. The apparatus can include a temperature control system. The temperature control system can be configured to regulate the temperature of the separation grid to affect a uniformity of a plasma process on a substrate. In some embodiments, a separation grid can have a varying thickness profile across a cross-section of the separation grid to affect a flow of neutral species through the separation grid.
Abstract:
Systems and methods for protecting vacuum seals in a plasma processing system are provided. The plasma processing system can include a vacuum chamber defining a sidewall and an inductive coil wrapped around at least a portion of the sidewall. A vacuum seal can be positioned between the sidewall of the vacuum chamber and a heat sink. A thermally conductive bridge can be coupled between the sidewall and heat sink. Further, the thermally conductive bridge can be positioned relative to the vacuum seal such that the thermally conductive bridge redirects a conductive heat path from the sidewall or any heat source to the heat sink so that the heat path bypasses the vacuum seal.
Abstract:
A plasma reactor and method for improved gas injection for an inductive plasma source for dry strip plasma processing are disclosed. According to embodiments of the present disclosure, gas is fed into a plasma chamber through a gas injection channel located adjacent to the side wall of the plasma chamber, rather than from the center, so that the process gas enters the plasma chamber in a close proximity to the induction coil. In particular embodiments, the process gas that enters the chamber is forced to pass through a reactive volume or active region adjacent the induction coil where efficient heating of electrons occurs, providing increased efficiency of the reactor by improving process gas flow and confinement in the heating area.
Abstract:
Plasma processing apparatus and methods are disclosed. Embodiments of the present disclosure include a processing chamber having an interior space operable to receive a process gas, a substrate holder in the interior of the processing chamber operable to hold a substrate, and at least one dielectric window. A metal shield is disposed adjacent the dielectric window. The metal shield can have a peripheral portion and a central portion. The processing apparatus includes a primary inductive element disposed external to the processing chamber adjacent the peripheral portion of the metal shield. The processing apparatus can further include a secondary inductive element disposed between the central portion of the metal shield and the dielectric window. The primary and secondary inductive elements can perform different functions, can have different structural configurations, and can be operated at different frequencies.
Abstract:
Plasma processing apparatus are provided. In one example implementation, a plasma processing apparatus includes a processing chamber. The apparatus includes a pedestal operable to support a workpiece in the processing chamber. The apparatus includes a plasma chamber. The plasma chamber defines an active plasma generation region along a vertical surface of a dielectric sidewall of the plasma chamber. The apparatus includes a separation grid positioned between the processing chamber and the plasma chamber along a vertical direction. The apparatus includes a plurality of induction coils extending about the plasma chamber. Each of the plurality of induction coils can be disposed at a different position along the vertical direction. Each of the plurality of induction coils can be operable to generate a plasma in the active plasma generation region along the vertical surface of the dielectric sidewall of the plasma chamber.
Abstract:
Methods and apparatus to provide efficient and scalable RF inductive plasma processing are disclosed. In some aspects, the coupling between an inductive RF energy applicator and plasma and/or the spatial definition of power transfer from the applicator are greatly enhanced. The disclosed methods and apparatus thereby achieve high electrical efficiency, reduce parasitic capacitive coupling, and/or enhance processing uniformity. Various embodiments comprise a plasma processing apparatus having a processing chamber bounded by walls, a substrate holder disposed in the processing chamber, and an inductive RF energy applicator external to a wall of the chamber. The inductive RF energy applicator comprises one or more radiofrequency inductive coupling elements (ICEs). Each inductive coupling element has a magnetic concentrator in close proximity to a thin dielectric window on the applicator wall.
Abstract:
Plasma strip tools with process uniformity control are provided. In one example implementation, a plasma processing apparatus includes a processing chamber. The apparatus includes a first pedestal in the processing chamber operable to support a workpiece. The first pedestal can define a first processing station. The plasma processing apparatus can include a second pedestal in the processing chamber operable to support a workpiece. The second pedestal can define a second processing station. The apparatus can include a first plasma chamber disposed above the first processing station. The first plasma chamber can be associated with a first inductive plasma source. The first plasma chamber can be separated from the processing chamber by a first separation grid. The apparatus can include a second plasma chamber disposed above the second processing station. The second plasma chamber can be associated with a second inductive plasma source. The second plasma chamber can be separated from the processing chamber by a second separation grid.